摘要
Far-infrared(FIR)interferometer is widely used to measure the electron density in the magnetically confined fusion plasma devices.A new FIR laser interferometer with a total of 13 channels(8 horizontal channels and 5 oblique channels)is under development on the HL-3tokamak by using the formic-acid laser(HCOOH,f=694 GHz).In order to investigate the boundary electron density activity during the divertor discharge,three horizontal interferometry channels located at Z=-97,-76,76.5 cm have been successfully developed on HL-3 in 2023,and put into operation in recent experimental campaign,with a time resolution of<1.0μs and lineintegrated electron density resolution of~7.0×10^(16) m^(-2).This paper mainly focuses on the optical design of the three-channel interferometry system,as well as optical elements and recent experimental result on HL-3.
作者
牟俊任
李永高
李远
王再宏
丁宝钢
王浩西
易江
石中兵
Junren MOU;Yonggao LI;Yuan LI;Zaihong WANG;Baogang DING;Haoxi WANG;Jiang YI;Zhongbing SHI(Southwestern Institute of Physics,Chengdu 610041,People's Republic of China;East China Normal University,Shanghai 200241,People's Republic of China)
基金
supported by the National Magnetic Confinement Fusion Science Program of China(Nos.2019YFE03020004,2018YFE0304102 and 2019YFE03020002)
the Department of Science and Technology of Sichuan Province(No.2020YJ0463)。